Dec 18 13:02:36.188 INFO checking picto-0.4.3 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 13:02:36.189 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/picto/0.4.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 13:02:36.622 INFO [stdout] 78e7df89a613bcae132129700806a845041d79d7492b44918f0491cae680b2c9
Dec 18 13:02:36.629 INFO running `"docker" "start" "-a" "78e7df89a613bcae132129700806a845041d79d7492b44918f0491cae680b2c9"`
Dec 18 13:02:37.863 INFO [stderr]     Checking exoquant v0.2.0
Dec 18 13:02:37.867 INFO [stderr]     Checking xyz v0.2.1
Dec 18 13:02:37.867 INFO [stderr]     Checking imagefmt v4.0.0
Dec 18 13:02:37.872 INFO [stderr]     Checking image v0.12.4
Dec 18 13:02:39.732 INFO [stderr]     Checking picto v0.4.3 (/opt/crater/workdir)
Dec 18 13:02:42.088 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:02:42.088 INFO [stderr]    --> src/buffer/buffer.rs:514:10
Dec 18 13:02:42.089 INFO [stderr]     |
Dec 18 13:02:42.089 INFO [stderr] 514 |     fn from(mut value: &'a mut Buffer<P, C, D>) -> view::Write<'a, P, C> {
Dec 18 13:02:42.089 INFO [stderr]     |             ----^^^^^
Dec 18 13:02:42.089 INFO [stderr]     |             |
Dec 18 13:02:42.090 INFO [stderr]     |             help: remove this `mut`
Dec 18 13:02:42.090 INFO [stderr]     |
Dec 18 13:02:42.090 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 13:02:42.090 INFO [stderr] 
Dec 18 13:02:42.091 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:02:42.092 INFO [stderr]    --> src/buffer/buffer.rs:525:10
Dec 18 13:02:42.092 INFO [stderr]     |
Dec 18 13:02:42.092 INFO [stderr] 525 |     fn from(mut value: &'a mut Buffer<P, C, D>) -> View<'a, P, C> {
Dec 18 13:02:42.092 INFO [stderr]     |             ----^^^^^
Dec 18 13:02:42.093 INFO [stderr]     |             |
Dec 18 13:02:42.093 INFO [stderr]     |             help: remove this `mut`
Dec 18 13:02:42.093 INFO [stderr] 
Dec 18 13:02:42.536 INFO [stderr] warning: field is never used: `owner`
Dec 18 13:02:42.536 INFO [stderr]   --> src/iter/pixel/immutable.rs:27:2
Dec 18 13:02:42.536 INFO [stderr]    |
Dec 18 13:02:42.536 INFO [stderr] 27 |     owner: Region,
Dec 18 13:02:42.536 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 18 13:02:42.536 INFO [stderr]    |
Dec 18 13:02:42.536 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 13:02:42.536 INFO [stderr] 
Dec 18 13:02:42.536 INFO [stderr] warning: field is never used: `owner`
Dec 18 13:02:42.536 INFO [stderr]   --> src/iter/pixel/mutable.rs:28:2
Dec 18 13:02:42.536 INFO [stderr]    |
Dec 18 13:02:42.536 INFO [stderr] 28 |     owner: Region,
Dec 18 13:02:42.536 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 18 13:02:42.536 INFO [stderr] 
Dec 18 13:02:45.117 INFO [stderr] warning: constant item is never used: `LOWER`
Dec 18 13:02:45.117 INFO [stderr]   --> examples/draw.rs:25:1
Dec 18 13:02:45.117 INFO [stderr]    |
Dec 18 13:02:45.117 INFO [stderr] 25 | const LOWER: char = '▄';
Dec 18 13:02:45.117 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 13:02:45.117 INFO [stderr]    |
Dec 18 13:02:45.117 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 13:02:45.117 INFO [stderr] 
Dec 18 13:02:46.352 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:02:46.352 INFO [stderr]    --> src/buffer/buffer.rs:514:10
Dec 18 13:02:46.352 INFO [stderr]     |
Dec 18 13:02:46.352 INFO [stderr] 514 |     fn from(mut value: &'a mut Buffer<P, C, D>) -> view::Write<'a, P, C> {
Dec 18 13:02:46.352 INFO [stderr]     |             ----^^^^^
Dec 18 13:02:46.352 INFO [stderr]     |             |
Dec 18 13:02:46.352 INFO [stderr]     |             help: remove this `mut`
Dec 18 13:02:46.352 INFO [stderr]     |
Dec 18 13:02:46.352 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 13:02:46.352 INFO [stderr] 
Dec 18 13:02:46.352 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:02:46.352 INFO [stderr]    --> src/buffer/buffer.rs:525:10
Dec 18 13:02:46.352 INFO [stderr]     |
Dec 18 13:02:46.352 INFO [stderr] 525 |     fn from(mut value: &'a mut Buffer<P, C, D>) -> View<'a, P, C> {
Dec 18 13:02:46.352 INFO [stderr]     |             ----^^^^^
Dec 18 13:02:46.352 INFO [stderr]     |             |
Dec 18 13:02:46.352 INFO [stderr]     |             help: remove this `mut`
Dec 18 13:02:46.352 INFO [stderr] 
Dec 18 13:02:46.836 INFO [stderr] warning: field is never used: `owner`
Dec 18 13:02:46.836 INFO [stderr]   --> src/iter/pixel/immutable.rs:27:2
Dec 18 13:02:46.836 INFO [stderr]    |
Dec 18 13:02:46.836 INFO [stderr] 27 |     owner: Region,
Dec 18 13:02:46.836 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 18 13:02:46.836 INFO [stderr]    |
Dec 18 13:02:46.836 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 13:02:46.836 INFO [stderr] 
Dec 18 13:02:46.836 INFO [stderr] warning: field is never used: `owner`
Dec 18 13:02:46.836 INFO [stderr]   --> src/iter/pixel/mutable.rs:28:2
Dec 18 13:02:46.836 INFO [stderr]    |
Dec 18 13:02:46.836 INFO [stderr] 28 |     owner: Region,
Dec 18 13:02:46.836 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 18 13:02:46.836 INFO [stderr] 
Dec 18 13:02:47.023 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.31s
Dec 18 13:02:47.516 INFO running `"docker" "inspect" "78e7df89a613bcae132129700806a845041d79d7492b44918f0491cae680b2c9"`
Dec 18 13:02:47.633 INFO running `"docker" "rm" "-f" "78e7df89a613bcae132129700806a845041d79d7492b44918f0491cae680b2c9"`
Dec 18 13:02:47.728 INFO [stdout] 78e7df89a613bcae132129700806a845041d79d7492b44918f0491cae680b2c9